<template>
  <div class="xtx-cart-page">
    <div class="container">

      <XtxBread>
        <XtxBreadItem to="/">首页</XtxBreadItem>
        <XtxBreadItem>购物车</XtxBreadItem>
      </XtxBread>

      <!-- 购物车主体 -->
      <div class="cart">
        <table>
          <!-- 表头 -->
          <thead>
            <tr>
              <!-- 全选 -->
              <th width="120">
                <!-- <XtxCheckbox v-model="validListSeledAll">全选</XtxCheckbox> -->
                <XtxCheckbox :modelValue="validListSeledAll" @update:modelValue="selAll($event, 123)">全选</XtxCheckbox>
              </th>
              <th width="400">商品信息</th>
              <th width="220">单价</th>
              <th width="180">数量</th>
              <th width="180">小计</th>
              <th width="140">操作</th>
            </tr>
          </thead>
          <!-- 有效商品列表 -->
          <tbody>
            <tr v-for="good in validList" :key="good.skuId">
              <!-- 单选 -->
              <!--
                现象❓:
                1. v-model="good.selected", v-model 会修改 good.selected 的值
                2. 违背了 vuex 修改数据的原则: 只能通过 mucations 函数修改
                解决:
                  v-model 完整写法:
                    1. :modelValue="good.selected"
                    2. @update:modelValue="callback"
              -->
              <!-- <td><XtxCheckbox v-model="good.selected" /></td> -->
              <!-- 说明❓: $event 获取子传父的值 -->
              <td><XtxCheckbox :modelValue="good.selected" @update:modelValue="singleSel(good, $event)" /></td>
              <td>
                <div class="goods">
                  <RouterLink to="/" ><img :src="good.picture" alt="" /></RouterLink>
                  <div>
                    <p class="name ellipsis">{{ good.name }}</p>
                    <!-- 选择规格组件 -->
                  </div>
                </div>
              </td>
              <td class="tc">
                <!-- 现价 -->
                <!-- 说明: good.nowPrice 字符串不能使用 toFixed(2) 方法 -->
                <p>&yen;{{ parseFloat(good.nowPrice).toFixed(2) }}</p>
                <!-- 运算情况下会隐式转换 -->
                <p>比加入时降价<span class="red">&yen;{{ (good.price - good.nowPrice).toFixed(2) }}</span></p>
              </td>
              <td class="tc">
                <!-- 购买数量 -->
                <Numbox :showLabel="false" v-model="good.count" :modal-value="good.count" @update:modelValue="changeNum(good, $event)" />
              </td>
              <td class="tc">
                <p class="f16 red">&yen;{{ (good.nowPrice * good.count).toFixed(2) }}</p>
              </td>
              <td class="tc">
                <p>
                  <a @click="delCart(good)" class="green" href="javascript:;">删除</a>
                </p>
              </td>
            </tr>
          </tbody>
        </table>
      </div>

      <!-- 操作栏 -->
      <div class="action">
        <div class="batch">
          共 {{ validList.length }} 件商品，已选择 {{ validSeledList.length }} 件，选中商品合计：
          <span class="red">¥{{ validSeledListTotal.toFixed(2) }}</span>
        </div>
        <div class="total">
          <XtxButton @click="goOder" type="primary">下单结算</XtxButton>
        </div>
      </div>

    </div>
  </div>
</template>

<script>
import { mapGetters, useStore } from 'vuex'
import { msg } from 'rabbit-ui-core'
import { useRouter } from 'vue-router'

export default {
  name: 'XtxCartPage',
  computed: {
    ...mapGetters('cart', ['validList', 'validSeledList', 'validSeledListTotal', 'validListSeledAll'])
  },

  setup () {
    const store = useStore()
    // 1. 商品的单选:
    /**
     * good 当前勾选的商品
     * sel 当前商品的勾选状态
     */
    const singleSel = (good, sel) => {
      // console.log('XtxCheckbox传递的选中状态: ', good, sel)
      store.dispatch('cart/singleSelAction', { good, sel })
    }

    // 2. 商品的全选和取消
    /**
     * isSelAll 是否是全选
     */
    const selAll = (isSelAll) => {
      // console.log('是否是全选: ', isSelAll)
      store.dispatch('cart/selAllAction', isSelAll)
    }

    // 修改购物车中商品的购买数量
    /**
     * good 修改数量的商品
     * num 修改的数量
     */
    const changeNum = (good, num) => {
      store.dispatch('cart/changeNumAction', { good, num })
    }

    // 删除购物车中的商品
    const delCart = (good) => {
      store.dispatch('cart/delCartAction', good)
    }

    // 点击下单, 跳转创建订单页面
    const router = useRouter()
    const goOder = () => {
      /**
       * 1. 满足条件:
       *    1. 必须登录
       *    2. 购物车列表至少选中一件商品下单
       * 2. 跳转创建订单页面
       */
      // console.log(store)
      if (!store.state.user.profile.token) {
        return msg({ text: '请先登录, 才能下单' })
      }
      if (store.getters['cart/validSeledList'].length === 0) {
        return msg({ text: '请至少选中一件商品, 才能下单' })
      }
      // 执行跳转下单
      router.push('/order')
    }

    return { singleSel, selAll, changeNum, delCart, goOder }
  }
}
</script>

<style scoped lang="less">
.tc {
  text-align: center;
  .xtx-numbox {
    margin: 0 auto;
    width: 120px;
  }
}
.red {
  color: @priceColor;
}
.green {
  color: @xtxColor;
}
.f16 {
  font-size: 16px;
}
.goods {
  display: flex;
  align-items: center;
  img {
    width: 100px;
    height: 100px;
  }
  > div {
    width: 280px;
    font-size: 16px;
    padding-left: 10px;
    .attr {
      font-size: 14px;
      color: #999;
    }
  }
}
.action {
  display: flex;
  background: #fff;
  margin-top: 20px;
  height: 80px;
  align-items: center;
  font-size: 16px;
  justify-content: space-between;
  padding: 0 30px;
  .xtx-checkbox {
    color: #999;
  }
  .batch {
    a {
      margin-left: 20px;
    }
  }
  .red {
    font-size: 18px;
    margin-right: 20px;
    font-weight: bold;
  }
}
.tit {
  color: #666;
  font-size: 16px;
  font-weight: normal;
  line-height: 50px;
}
.xtx-cart-page {
  .cart {
    background: #fff;
    color: #666;
    table {
      border-spacing: 0;
      border-collapse: collapse;
      line-height: 24px;
      th,
      td {
        padding: 10px;
        border-bottom: 1px solid #f5f5f5;
        &:first-child {
          text-align: left;
          padding-left: 30px;
          color: #999;
        }
      }
      th {
        font-size: 16px;
        font-weight: normal;
        line-height: 50px;
      }
    }
  }
}
</style>
